Taxonomic novelties in Trechispora (Trechisporales, Basidiomycota) from Brazil
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ORIGINAL ARTICLE
Taxonomic novelties in Trechispora (Trechisporales, Basidiomycota) from Brazil Renata dos Santos Chikowski 1
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Karl-Henrik Larsson 2
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Tatiana Baptista Gibertoni 1
Received: 13 July 2020 / Revised: 22 September 2020 / Accepted: 24 September 2020 # German Mycological Society and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Collections from field expeditions to the Atlantic Forest and to Amazonia in Brazil and revision of herbarium material revealed the presence of Trechispora specimens that could not be assigned to any described species. Phylogenetic analysis based on nuc rDNA ITS1-5.8S-ITS2 (ITS) and nuc 28S rDNA (28S) regions confirmed that these specimens belong to two new species, here described as Trechispora mollis and Trechispora torrendii. Trechispora mollis has a densely hydnoid hymenophore and is most similar to T. nivea, but differs from it by the presence of inflated cells in the subiculum. Trechispora torrendii has a minutely grandinioid hymenophore similar to T. farinacea, but these two species are genetically well separated. The new combinations T. brasiliensis and T. mellina are proposed, and new records from Brazilian regions and biomes are reported. Descriptions, illustrations, a key to Brazilian species of Trechispora, the first sequence of T. rigida, and a phylogeny for the genus are presented. Keywords Agaricomycetes . Corticioid fungi . Neotropics . Pluvial forest
Introduction Karsten (1890) proposed the genus Trechispora P. Karst. for the single species T. onusta P. Karst. [=T. hymenocystis (Berk. & Broome) K.H. Larss.], a species with resupinate and fragile basidiomata, poroid hymenophore, and small, echinulate basidiospores. Currently, nearly 50 species are accepted in the genus (Liberta 1966, 1973; Larsson 1994, 1995, 1996; Ryvarden 2002; Trichiès and Schultheis 2002; Miettinen and Larsson 2006; Kirk et al. 2008; Bernicchia and Gorjón 2010; Ordynets et al. 2015; Phookamsak et al. 2019; Xu et al. 2019), and 27 of them occur in the tropics, subtropics, and South Hemisphere (Hjortstam and Ryvarden 2007a). The Section editor: Yu-Cheng Dai. This article is part of the Topical collection on diversity and phylogeny of wood-decaying Basidiomycota. * Renata dos Santos Chikowski [email protected] 1
Departamento de Micologia, Centro de Biociências, Universidade Federal de Pernambuco (UFPE), Av. da Engenharia s/n, Recife 50740-600, Brazil
2
Natural History Museum, University of Oslo (UiO), P.O. Box 1172, Blindern, 0318 Oslo, Norway
basidiomata of the majority of accepted species are resupinate, but some develop more elaborated basidiomata (spathulate or stipitate). The hymenophore is mostly smooth, granular (grandinioid), or spine-like (hydnoid). Only a few species have a poroid hymenophore. The hyphal system is monomitic or dimitic, the skeletal hyphae when present occur mostly in the subiculum, septa are always clamped, and undifferentiated mycelial cords are common in the subiculum. Basidia are short and cylindrical, and the basidiospores a
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